Commit: d1eb762b579b531a78f117a1c123465b8647296d
Author: Antony Riakiotakis
Date: Thu Nov 6 15:03:34 2014 +0100
Branches: master
https://developer.blender.org/rBd1eb762b579b531a78f117a1c123465b8647296d
Fix T42492, Shading error with fresnel weight node.
Orthographic case needs different handling.
===================================================================
M source/blender/gpu/shaders/gpu_shader_material.glsl
===================================================================
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl
b/source/blender/gpu/shaders/gpu_shader_material.glsl
index 39e8b31..4e910cd 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -2274,10 +2274,12 @@ void node_layer_weight(float blend, vec3 N, vec3 I, out
float fresnel, out float
{
/* fresnel */
float eta = max(1.0 - blend, 0.00001);
- fresnel = fresnel_dielectric(normalize(I), N, (gl_FrontFacing)? 1.0/eta
: eta );
+ vec3 I_view = (gl_ProjectionMatrix[3][3] == 0.0)? normalize(I):
vec3(0.0, 0.0, -1.0);
+
+ fresnel = fresnel_dielectric(I_view, N, (gl_FrontFacing)? 1.0/eta : eta
);
/* facing */
- facing = abs(dot(normalize(I), N));
+ facing = abs(dot(I_view, N));
if(blend != 0.5) {
blend = clamp(blend, 0.0, 0.99999);
blend = (blend < 0.5)? 2.0*blend: 0.5/(1.0 - blend);
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